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Tagalog The selection of geometric parameters for punching and shearing machine tools is a key step in ensuring machining effectiveness and efficiency. Here are some suggestions for selecting geometric parameters of punching and shearing machine tools:
1. * * Front corner * *:
*The leading angle mainly affects cutting deformation, cutting force, and cutting temperature. For processing brittle materials, due to the small deformation, a smaller front angle can be chosen. For processing plastic materials, in order to reduce cutting force and cutting temperature, a larger front angle should be selected.
*If the stiffness of the process system is low and prone to vibration, a larger front angle should also be selected to reduce cutting force.
*To ensure machining reliability on automatic lines, smaller front corners are usually selected.
2. * * Rear corner * *:
*The main function of the back angle is to reduce the friction between the tool’s back face and the workpiece during the cutting process. For precision machining or situations with thin cutting thickness, a larger back angle should be selected.
*When the strength and hardness of the workpiece material are high, or when the tool needs to withstand impact loads, a smaller back angle should be selected to increase the durability of the tool.
3. * * Principal deviation angle * *:
*Reducing the main deviation angle can reduce the height of residual area on the processed surface, thereby improving surface quality. At the same time, reducing the main deviation angle can also improve the strength of the tool tip, improve heat dissipation conditions, and be beneficial for improving tool life.
*When using hard alloy cutting tools for rough or semi precision machining, or when the tool needs to cut into the workpiece in the middle, a larger main deviation angle can be selected.
4. * * Sub deflection angle * *:
*In precision machining, in order to achieve better machining quality, a smaller secondary deviation angle should be selected.
*When the stiffness of the workpiece or tool is poor, or when the tool needs to cut in or feed in both directions during the cutting process, it is also possible to consider selecting a larger secondary angle.
When selecting the geometric parameters of the punching and shearing machine tool, it is also necessary to comprehensively consider factors such as the properties of the processing material, processing requirements, cutting conditions, as well as the durability and cost of the tool. Different materials and processing requirements may require different combinations of tool geometric parameters. Therefore, in the selection process, it is recommended to refer to the recommended values of the tool manufacturer and adjust and optimize them based on the actual machining situation.
In addition, for complex machining tasks or special materials, it may be necessary to determine the optimal combination of tool geometric parameters through experiments. This can be achieved by conducting cutting tests on the test bench, observing cutting effects, tool wear, and machining quality indicators, in order to obtain the most suitable tool geometry parameters for the current machining task.
